/Engine/Plugins/Runtime/RigVM/Source/RigVM/Public/RigVMCore/RigVMGraphFunctionHost.h
[FRigVMGraphFunctionData](API\Plugins\RigVM\RigVMCore\FRigVMGraphFunctionData) * AddFunction ( const [FRigVMGraphFunctionHeader](API\Plugins\RigVM\RigVMCore\FRigVMGraphFunctionHeader) & FunctionHeader, bool bIsPublic )